Superstar_4900B_sch.pdf

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1、Features: * 23.815 Mhz to 30.555 Mhz Continuous Coverage (Requires Export Mod) * Single Chip Microprocessor Controller (LC72338) * Clarifier Control Tracks Both Transmit And Receive (SSB Approx. 40Khz) * Programmable Memory Function (Stores Favorite Frequencies) * Backlit Liquid Crystal Display (Fre

2、quency, Channel, Functions Menu) * Digital Meter Scale Displays Signal, Power Output, SWR and Modulation (AM only) * Dual Watch Mode (Allows Monitoring Two Freq. Simultaneously) * Red/Green Transmit/Receive LED Indicator * Two Antenna Connectors on Rear Panel, Push Button Front Panel Selectable. * N

3、oise Blanker/Automatic Noise Limiter * Roger Beep (Switch Selectable) * Variable Mic Gain Control * Variable Receive RF Gain Control * AM/FM/USB/LSB Operation * 25 Watts Variable RF Output Power SSB (2SC2166 X1 - 2SC1969 X2) * 10-15 Watts Variable RF Output Power AM (2SC2166 X1 - 2SC1969 X2) * Four

4、Step Dimmer lamp Control * Split Frequency Capability for Repeater Use * Dual Power - 120VAC Operation or 13.8 VDC Operation * DTMF Page Mode (Touch Tone Paging) * DTMF Auto Reply Function (Touch Tone Auto Signaling) * DTMF Coded Squelch Operation (Receiver Muted Until Special DTMF Received) * DTMF

5、Encoder Pad (Allows Direct DTMF Frequency Entry) SuperStar 4900B 10 Meter Base Radio for free by RadioAmateur.eu for free by RadioAmateur.eu for free by RadioAmateur.eu CBT for free by RadioAmateur.eu CBT for free by RadioAmateur.eu Superstar 4900B, Maycom BS29UH First Draft On PCB Layouts. I have a

6、 few things to check out on these but look them over and if you see any discrepancies let me know. Any Help would be appreciated. Please keep in mind that this PDF prints better than it displays. Thanks CBT Rev. #1.1 Jan 2001 Revision History 1.0 Created 1.1 Put label on IC9 on main board layout for

7、 free by RadioAmateur.eu for free by RadioAmateur.eu for free by RadioAmateur.eu for free by RadioAmateur.eu for free by RadioAmateur.eu for free by RadioAmateur.eu for free by RadioAmateur.eu for free by RadioAmateur.eu for free by RadioAmateur.eu for free by RadioAmateur.eu for free by RadioAmateur.eu for free by RadioAmateur.eu for free by RadioAmateur.eu for free by RadioAmateur.eu for free by RadioAmateur.eu